1. Chapter 8 Multiplexing Many to one/one to many Types of multiplexing
Telephone system

2. Multiplexing vs. No Multiplexing
Figure 8-1
Multiplexing vs. No Multiplexing

3. Figure 8-2

4. Frequency Division Multiplexing
Useful bandwidth of medium exceeds required bandwidth of channel
Each signal is modulated to a different carrier frequency, i.e. three lane highway
Carrier frequencies separated by strips of unused bandwidth (guard bands) so signals do not overlap
e.g. broadcast radio and Cable TV
Channel allocated even if no data

5. Frequency Division Multiplexing

6. Figure 8-3
FDM

7. Figure 8-4
FDM, Time Domain

8. Multiplexing, Frequency Domain
Figure 8-5
Multiplexing, Frequency Domain
The bandwidth of the resulting composite signal is more then three time the bandwidth of each input signal: necessary channels plus guard bands.

9. Demultiplexing, Time Domain
Figure 8-6
Demultiplexing, Time Domain
The demultiplexer uses a series of band pass filters to decompose constituent component signal

10. Demultiplexing, Frequency Domain
Figure 8-7
Demultiplexing, Frequency Domain

11. FDM System